Rocker arm resurfacing machine



June 1954 L. TALBOTT ET AL ROCKER ARM RESURFACING MACHINE 2 Sheets-Sheet1 Filed May 2, 1952 INVENTORS 3 W AB L L Q M. m A a Wm m v 3 F L Y p B,W

June 1954 L. L. TALBOTT ET AL 2,682,136

ROCKER ARM RESURFACING MACHINE Filed May 2, 1952 2 Sheets-Sheet 2 118,8q I P ggy 42 i2 Z 0 t J 3 INVENTORS FRANK 6. LA\DLAW LEONARD L..TA\a-.oTT BY Patented June 29, 1954 UNITED STATES PATENT OFFICE ROCKER ARMRESURFACING MACHINE LeonardL. Talbott and Frank G. Laidlaw,

Reno, Nev.

Application May 2,1952,Scria1' No. 285,587

2 Claims. (Cl. 51-56) This invention relates to grinding machines, andmore particularly to a machine for use in resurfacing valve rocker armsof internal combustionengines.

The main object of the invention is to provide-a-nove1 and improvedrocker arm resurfacingmachine which is simple in construction, which iseasy to operate, and which is adjustable to accommodate a wide range ofsizes of valve ing of the rocker arm faces to the necessary curvedsurfaces recommended by automobile manufacturers for best operation ofthe rocker arms.

Further objects and advantages of the invention will become apparentfrom the following description and claims, and from the accompanying,drawings, wherein:

Figure 1 is a side elevational view of an improved rocker armresurfacing machine constructed in accordance with the presentinvention, showing a conventional rocker arm assembly mounted therein inposition for resurfacing.

Figure 2 is a top plan view of the structure shown in Figure 1.

Figure 3 is an enlarged end elevational view of the structure shown inFigures 1 and 2.

Figure 4 is an enlarged transverse vertical cross sectional view takenon the line 44 of Figure 1.

Figure 5 is a cross sectional detail view taken on the line 5-5 ofFigure 4.

Referring to the drawings, the improved rocker arm resurfacing machineis designated generally at H] and comprises a pair of elongated parallelrods H and i2 rigidly connected at one end by a transverse, verticalplate member l3 and rigidly connected at their opposite ends by anupstanding transverse vertical plate member I4. The plate member M isformed at its forward portion with the vertical arm l5 in the upperportion of which is secured an inwardly directed stud element l6 havinga tapered point ll. Designated at it is a transversely extendingupstanding vertical plate member generally similar in shape to the platemember 14 and formed with the vertical upstanding arm I9 at its forwardportion. The plate member I8 is rigidly secured torespectivesleevemembers 28 and it which are slidably mounted on the respective rods 12and H, the sleeve member 26 beingformed with the clamping portion 22having-the opposed parallel lugs 23 and 2d. Designated at 25-is aclamping screw which extends througlr the lug 2i and is threadedlyengaged with the lug 23, whereby the portion 22 may be tightly clampedto the rod [2 by' tightening the screw 25, thus locking the plate memberid in an adjustedposition on the rods H and i2.

The arm lfi has secured thereto the inwardly extending stud element 26which is in alignment with and opposes the stud element Iii, the studelement 25 being formed with the tapered; point 2i which is inlongitudinal alignment with:

and opposes the tapered point i? of stud element l6.

As shown in Figure 1, the stud elements it and 25 are adapted to engagein the ends of the shaft 23 of a conventional rocker arm assembly 29' tosupport said rocker arm assembly in parallelrelationship to the rods IEand i2 and in a pee sition elevated above the plane of said rods.

Designated respectively at 36 and iii are respective sleeve membersslidacly engaged on the rods [2 and i I and having welded thereto theupstanding, parallel plate members 32 and 33.

which are rigidly connected by the respective transversely extending rodmembers 34 and 35,.-

said rod members 3t and 35 being located substantially at the oppositetop corners of the plate members 32 and 33. The sleeve members 30 and3!, the plate members 32 and 33, and the rods 34 and 35 thus define arigid bracket memberwhich is slidable longitudinally on the rods H andi2.

Slidably mounted on the rod members 3d and 35 are therespective sleeves35 and ill to which is rigidly secured a plate member 38. on the platemember Silland extending trans versely to the rods [2 and H are theparallel, inverted angle bars 39 and d!) which have secured to theirouter top portions the respective arcuate clamping straps ll and Q2. Thestraps 4| and 42 terminate in the respective upstanding apertured lugs43 and 44 through which extends a clamping bolt 45. Designated at 46 isan electric motor which is clampingly secured on the angle bars 39 andit by the clamping straps 4| and 42, as shown in Figures 3, 4 and 5. Theshaft of the motor extends transversely with respect to the rods H andI2 and has mounted on its end the grinding wheel 41. Designatedrespectively at 48, 48 are coiled springs surrounding the rods 34 and 35and biasing the sleeve members 36 and 31 toward the verticallongitudinal plane containing the axis defined by the stud elements [6and 26.

Secured to the forward peripheral portion of the motor casing is theguard disc 49 which covers the upper portion of the grinding wheel 47and which is formed with a relatively large V-shaped notch 50 at itslower portion, allowing a rocker arm to be rotated into engagement withthe lower portion of the front face of the grinding wheel 41, as isclearly shown in Figure 1.

In using the device, the rocker arm assembly 29 is mounted in the mannershown in Figure 1, with the ends of the rocker arm shaft 28 engaging andsupported by the stud elements [6 and 26, the plate member l8 beinglocked in a position wherein its stud element 26 supportingly engagesthe end of the rocker arm shaft 28 by tightening the clamping screw 25.As shown in Figure l, the rocker arm faces may then be successivelyrotated into engagement with the grinding wheel 41, the motor 46 beingenergized to rotate said grinding wheel. be successively resurfaced, therocker arms being rotatable and the grinding wheel being yieldablerearwardly against the biasing force of the springs 48, 48, to allow therocker arm faces to be correctly shaped.

It will be readily apparent that the bracket means defined by the platemember [8 and its supporting sleeves 20 and 2| is readily adjustablelongitudinally on the rails H and I2 to accommodate rocker armassemblies 29 of different lengths.

While a specific embodiment of an improved resurfacing machine forrocker arms of internal combustion engines has been disclosed in theforegoing description, it will be understood that various modificationswithin the spirit of the invention may occur to those skilled in theart. Therefore, it is intended that no limitations be placed in theinvention except as defined by the scope of the appended claims.

What is claimed is:

1. A machine for refacing rocker arms of an internal combustion enginecomprising a pair of parallel guide rails, means rigidly connecting theends of the rails, including an upstanding support member, a first studelement on said support member extending parallel to said rails, a firstupstanding bracket slidably mounted on said rails, a second stud elementon said bracket in alignment with and opposing the first stud elementand defining therewith means for rotatably supporting the shaft of arocker arm assembly in parallelism with said rails, a second upstandingbracket slidably mounted on said rails, an electric motor, meansslidably supporting said motor on said last-named bracket for movementat right The rocker arm faces may then 3 angles to the rails, springmeans biasing said motor toward the vertical plane of the stud elements,said motor being mounted with its shaft extending transverse to therails, and a grinding wheel secured to the motor shaft, said grindingwheel being engaged and moved rearwardly against the bias of said springmeans on rotation of said rocker arm, whereby to grind said rocker armto the desired curvature.

2. A machine for refacing rocker arms of an internal combustion enginecomprising a pair of parallel guide rails, means rigidly connecting theends of the rails, including an upstanding support member, a first studelement on said support member extending parallel to said rails, a firstupstanding bracket slidably mounted on said rails, a second stud elementon said bracket in alignment with and opposing the first stud elementand defining therewith means for rotatably supporting the shaft of arocker arm assembly in parallelism with said rails, means releasablylocking said bracket with respect to said rails, a second upstandingbracket slidably mounted on said rails, an electric motor, meansslidably supporting said motor on said second bracket for movement atright angles to the rails, spring means biasing said motor toward thevertical plane of the stud elements, said motor being mounted with itsshaft extending transverse to the rails, a grinding wheel secured to themotor shaft, and a guard disc secured to said motor and covering theupper portion of said grinding wheel, the guard disc having a relativelylarge V-shaped notch in its lower portion, thereby allowing a rocker armto be rotated into engagement with the lower portion of the grindingwheel, said grinding wheel being moved rearwardly against the bias ofsaid spring means on continued rotation of said rocker arm, whereby toshape said rocker arm to the desired curvature.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 238,366 Doane Mar. 1, 1881 492,451 Winkley Feb. 28, 1893817,226 Davis Apr. 10, 1906 1,845,908 Cover Feb. 16, 1922 1,854,558Olmsted Apr. 19, 1932 1,957,568 Wills May 8, 1934 2,128,023 Specht et alAug. 23, 1938 2,205,541 Pizzotti June 25, 1940 2,309,615 Sunnen Jan. 26,1943 2,419,179 Swindle Apr. 15, 1947 2,643,489 Helm June 30, 1953FOREIGN PATENTS Number Country Date 619,401 Great Britain Mar. 9, 1949

